Department of Chemistry
200 University Ave. W
Canada N2L 3G1
The elephant’s toothpaste demonstration — used for the puking pumpkin in the October issue of Chem 13 News (page 20) — is truly a favourite demonstration of mine.
After more than 25 years as a classroom teacher, I think I have it figured out. Properly done, the whole school thing — at least for senior high school and university students — boils down to this...
I have posted the article below about PM2.5 pollution on Science 2.0. This website is a combined science magazine, blog and Facebook-type site for scientists and science educators. It has been in existence for about five years. Everything ever written for the site is accessible and free of charge.
At one time or another, all chemistry students have seen the colourful salts of copper(II), most commonly blue and green ones. Many students have investigated the reactions of copper(II) with a variety of common reagents as an exercise in qualitative inorganic analysis. However, few have investigated the chemistry of copper’s other oxidation state, copper(I); the only salts of copper(I) usually encountered are the oxide (red copper oxide) or one of its halides.